气候变化领域集成服务门户(CCPortal): North atlantic circulation regimes and heat transport by synoptic eddies

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DOI	10.1175/JCLI-D-19-0498.1
	North atlantic circulation regimes and heat transport by synoptic eddies
	Ruggieri P.; Alvarez-Castro M.C.; Athanasiadis P.; Bellucci A.; Materia S.; Gualdi S.
发表日期	2020
ISSN	0894-8755
起始页码	4769
结束页码	4785
卷号	33 期号:11
英文摘要	Meridional transport of heat by transient atmospheric eddies is a key component of the energy budget of the middle- and high-latitude regions. The heat flux at relevant frequencies is also part of a dynamical interaction between eddies and mean flow. In this study we investigate how the poleward heat flux by high-frequency atmospheric transient eddies is modulated by North Atlantic weather regimes in reanalysis data. Circulation regimes are estimated via a clustering method, a jet-latitude index, and a blocking index. Heat transport is defined as advection of moist static energy. The focus of the analysis is on synoptic frequencies but results for slightly longer time scales are reported. Results show that the synoptic eddy heat flux is substantially modulated by midlatitude weather regimes on a regional scale in midlatitude and polar regions. In a zonal-mean sense, the phases of the North Atlantic Oscillation do not significantly change the high-latitude synoptic heat flux, whereas Scandinavian blocking and the Atlantic ridge are associated with an intensification. A close relationship between high-latitude (midlatitude) heat flux and Atlantic jet speed (latitude) is found. The relationship between extreme events of synoptic heat flux and circulation regimes is also assessed and reveals contrasting behaviors in the polar regions. The perspective that emerges complements the traditional view of the interaction between synoptic eddies and the extratropical flow and reveals relationships with the highlatitude climate. © 2020 American Meteorological Society.
英文关键词	Atmospheric movements; Atmospheric pressure; Budget control; Heat transfer; Atmospheric eddy; Clustering methods; Dynamical interactions; High frequency HF; High-latitude regions; Meridional transport; Moist static energy; North Atlantic oscillations; Heat flux; eddy; energy budget; extratropical cyclone; heat flux; meridional circulation; North Atlantic Oscillation; synoptic meteorology; Atlantic Ocean; Atlantic Ocean (North)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171275
作者单位	Centro Euro-Mediterraneo sui Cambiamenti Climatici (CMCC), Bologna, Italy
推荐引用方式 GB/T 7714	Ruggieri P.,Alvarez-Castro M.C.,Athanasiadis P.,et al. North atlantic circulation regimes and heat transport by synoptic eddies[J],2020,33(11).
APA	Ruggieri P.,Alvarez-Castro M.C.,Athanasiadis P.,Bellucci A.,Materia S.,&Gualdi S..(2020).North atlantic circulation regimes and heat transport by synoptic eddies.Journal of Climate,33(11).
MLA	Ruggieri P.,et al."North atlantic circulation regimes and heat transport by synoptic eddies".Journal of Climate 33.11(2020).